#!/bin/sh

# This file was originally created automatically as part of default NTP application installation from debian package.
# This is now manually modified for supporting NTP in management VRF.
# When management VRF is enabled, the NTP application should be started using "ip vrf exec mgmt".
# Check has been added to verify the management VRF enabled status and use "ip vrf exec mgmt"  when it is enabled.
# This file will be copied to /usr/lib/ntp/ntp-systemd-wrapper file that gets created during build process.

DAEMON=/usr/sbin/ntpd
PIDFILE=/var/run/ntpd.pid

if [ -r /etc/default/ntp ]; then
        . /etc/default/ntp
fi

if [ -e /run/ntp.conf.dhcp ]; then
        NTPD_OPTS="$NTPD_OPTS -c /run/ntp.conf.dhcp"
fi

LOCKFILE=/run/lock/ntpdate

RUNASUSER=ntp
UGID=$(getent passwd $RUNASUSER | cut -f 3,4 -d:) || true
if test "$(uname -s)" = "Linux"; then
        NTPD_OPTS="$NTPD_OPTS -u $UGID"
fi

(
        flock -w 180 9
        # when mgmt vrf is configured, ntp starts in mgmt vrf by default unless user configures otherwise
        vrfEnabled=$(/usr/local/bin/sonic-cfggen -d -v 'MGMT_VRF_CONFIG["vrf_global"]["mgmtVrfEnabled"]' 2> /dev/null)
        vrfConfigured=$(/usr/local/bin/sonic-cfggen -d -v 'NTP["global"]["vrf"]' 2> /dev/null)
        if [ "$vrfEnabled" = "true" ]
        then
                if [ "$vrfConfigured" = "default" ]
                then
                            log_daemon_msg "Starting NTP server in default-vrf for default set as NTP vrf" "ntpd"
                            start-stop-daemon --start --quiet --oknodo --pidfile $PIDFILE --startas $DAEMON -- -p $PIDFILE $NTPD_OPTS
                else
                            log_daemon_msg "Starting NTP server in mgmt-vrf" "ntpd"
                            ip vrf exec mgmt start-stop-daemon --start --quiet --oknodo --pidfile $PIDFILE --startas $DAEMON -- -p $PIDFILE $NTPD_OPTS
                fi
        else
                log_daemon_msg "Starting NTP server in default-vrf" "ntpd"
                start-stop-daemon --start --quiet --oknodo --pidfile $PIDFILE --startas $DAEMON -- -p $PIDFILE $NTPD_OPTS
        fi
) 9>$LOCKFILE

